“…A growing number of investigations have empirically explored potential predictors of substance use treatment dropout, including demographics (Maglione, Chao, & Anglin, 2000), psychiatric symptoms (Hattenschwiler, Ruesch, & Modestin, 2001), emotional symptoms (McCusker, Stoddard, Frost, & Zorn, 1996), drug use severity (Ravndal & Vaglum, 1991), and a variety of social-cognitive variables (e.g., social support, self-efficacy, motivation to quit; Blanchard, Morgenstern, Morgan, Labouvie, & Bux, 2003;Daley, Salloum, Zuckoff, & Kirisci, 1998;Mertens & Weisner, 2000;Messina, Wish, & Nemes, 2000). However, due to little agreement on the consistency or the generalizability of these findings (Claus, Kindleberger, & Dugan, 2002;McFarlain, Cohen, Yoder, & Guidry, 1977;Nemes, Wish, & Messina, 1999;Alterman, McKay, Mulvaney, & McLellan, 1996;Agosti, Nunes, Stewart, & Quitkin, 1991), it has become apparent that it is important to identify and examine other constructs that may contribute to the understanding of the processes involved in a patient's decision to remain in or prematurely leave residential treatment.…”